ive been looking around and ive also seen a 4.7 lower reduction output for the stock t-case for my truck, would that be a big aid in a crawl as well? id see it as a easy modification without having to tear deep into my drivetrain and installing dual cases or crawler box. anyone ever do this?? im just curious as to how invloved it is and what diffrence it will make to a part time wheeler like myself.